alternator wiring help - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Electrical
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 05-13-2010, 06:25 PM
Registered User
 
Last photo:
Join Date: Jan 2010
Location: North Carolina
Posts: 61
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
alternator wiring help

I am trying to wire up my alternator to fit into my car. Attached is a pic of my problem. The plug doesnt match the prongs they need to get onto. I have a 1972 Nova and the alternator was supposed to be a late 60's early 70's sbc alternator.



how do I make this work.

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 05-13-2010, 06:47 PM
cobalt327's Avatar
WFO
 
Last wiki edit: Intake manifold
Last journal entry: 1980 Malibu Wagon
Last photo:
Join Date: Mar 2009
Location: Atlanta
Age: 60
Posts: 5,037
Wiki Edits: 1616

Thanks: 128
Thanked 597 Times in 546 Posts
If you have a external regulator and horn relay, and you want to swap a internal voltage regulator equipped SI, use :

Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 05-13-2010, 07:31 PM
Registered User
 
Last photo:
Join Date: Apr 2010
Location: Hawaii
Posts: 373
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
If I remember correctly, your 72 Nova was already equipped with an internally regulated alternator (the pic of the plug you drew shows this). The alternator you want to use is externally regulated...you don't have an external regulator in that car. So you're actually going "backwards" by trying to use an un-regulated alternator. Best solution is to turn that one in (or sell it) and get the right one.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 05-13-2010, 07:38 PM
Registered User
 
Last photo:
Join Date: Jan 2010
Location: North Carolina
Posts: 61
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Well when looking I have a external regulator and horn relay. I bought this car as a shell and have almost all done except the alternator and a few ends and odds. I have an alternator. The plug is what I am assuming, it might be for the HEI that I think was installed because the firewall is squished in to allow. There is also some wires at the end of the harness that have O ring terminals on them. I am sure that I need to pick up a service manual and find out what all of these wires are. I am just trying to fighure out what wires would go to what I have on the alternator I have as I want to use that alternator instead of buying another one.
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 05-13-2010, 07:54 PM
Registered User
 
Last photo:
Join Date: Apr 2010
Location: Hawaii
Posts: 373
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Here's a pic of the two different alternators.

http://www.hotrod.com/techarticles/m.../photo_20.html
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 05-13-2010, 07:58 PM
Registered User
 
Last photo:
Join Date: Jan 2010
Location: North Carolina
Posts: 61
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts


I think this is right.
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 05-13-2010, 08:39 PM
66GMC's Avatar
Get in, sit down, hang on
 

Last journal entry: Cab Removal
Last photo:
Join Date: May 2005
Location: Olds, Alberta Canada
Age: 57
Posts: 2,762
Wiki Edits: 0

Thanks: 32
Thanked 90 Times in 85 Posts
It sorta sounds like you might have the older style 10DN series alternator, similar to the one that came stock on my 66 GMC.

MOST of that type were only 37 or 42 Amp, and it sounds like the MAXIMUM output in this series was 63 Amps.


Does it look like this?





How to wire a 10DN series alternator

Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 05-13-2010, 09:01 PM
cobalt327's Avatar
WFO
 
Last wiki edit: Intake manifold
Last journal entry: 1980 Malibu Wagon
Last photo:
Join Date: Mar 2009
Location: Atlanta
Age: 60
Posts: 5,037
Wiki Edits: 1616

Thanks: 128
Thanked 597 Times in 546 Posts
Original plug's R = #2 on the SI alternator and voltage regulator
Original plug's F = #1 on the SI alternator, "F" on the regulator.

If the SI-type alternator is what you're going to use- which it should be, IMHO- you can easily splice the two wires of the old original plug, into a correct pigtail for the SI, they are available in the "HELP" section of the parts store, and elsewhere. A common repair part.

You can also buy a kit to wire the alternator up by just plugging in the original plug to an adaptor, then the adaptor to the new internally regulated alternator. Go to: http://www.wiringharness.com/, click on FAQ, then select "I want to install an Internal Regulated Alternator".
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 05-14-2010, 03:37 PM
Registered User
 
Last photo:
Join Date: Jan 2010
Location: North Carolina
Posts: 61
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
I do have that alternator in the pic and my wires have been cut by the previous owner so I was thinking I had a different type of connection. What color wires should I be looking for?
Reply With Quote Quick reply to this message
  #10 (permalink)  
Old 05-17-2010, 10:51 PM
Member
 
Last photo:
Join Date: May 2003
Location: Shreveport LA
Age: 65
Posts: 5,103
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Sounds like somebody may have changed it to a later alternator already. '72 Novas came with external regulators, at least mine (built Feb. '72) did.
Reply With Quote Quick reply to this message
  #11 (permalink)  
Old 05-18-2010, 04:19 PM
Registered User
 
Last photo:
Join Date: Jan 2010
Location: North Carolina
Posts: 61
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
the plug I thought was an alternator plug was not that. It looked like one tho was too short. The wires were cut that were to the alternator. Got that all sorted out, thanks for all of the help.
Reply With Quote Quick reply to this message

Recent Electrical posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -6. The time now is 07:07 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.